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Compass

Suunto EON Core includes a tilt-compensated digital compass, available as a main view.

Calibrating compass

When you first start using Suunto EON Core, the compass needs to be calibrated. Suunto EON Core displays the calibration icon when you enter the compass view. Calibrate the compass by slowly rotating the unit in your hand in large figure-8 loops.

During the calibration process, the compass adjusts itself to the surrounding magnetic field.

Because of changes in the surrounding magnetic field, it is recommended to re-calibrate the compass before each dive.

To manually start calibration:

Keep the middle button pressed to enter the menu.

Browse to General / Compass.

Press the middle button to enter Compass.

Scroll up or down to select Calibrate.

Start calibration by moving the device around in a 3D figure-8 as the image suggests.

A sound indicates the calibration succeeded, and the screen goes back to Compass menu.

NOTE:

If the calibration fails several times in a row, you may be in an area with strong sources of magnetism, such as large metal objects. Move to another location and try to calibrate the compass again.

Setting declination

You should always adjust your compass declination for the area where you are diving to get accurate heading readings. Check the local declination from a trusted source and set the value in Suunto EON Core.

To set declination:

Keep the middle button pressed to enter the menu.

Browse to General / Compass.

Press the middle button to enter Compass.

Press the middle button again to enter Declination.

Scroll up/down to set the angle of declination: Starting from 0.0º scroll up towards East or down towards West declination.
To turn declination off, set declination angle to 0.0º.

Press middle button to save changes and go back to the Compass menu.

Keep the middle button pressed to exit.

Setting bearing lock

A bearing is the angle between north and your target. In simple terms, it is the direction you want to travel. Your heading, on the other hand, is your actual direction of travel.

You can set a bearing lock to help you orientate yourself underwater and ensure you maintain your direction of travel. For example, you can set a bearing lock for the direction to the reef before leaving the boat.

You can reset the bearing lock at any time, but you can only clear a bearing lock while at the surface.

To set a bearing lock:

Press the middle button to change to the compass view.

Hold your Suunto EON Core in level in front of you, with the top pointing in the direction to your target.

Keep the lower button pressed until you see the Bearing locked notification.

Once you have a bearing locked, the lock position is indicated on the compass rose, as shown below.

Below your heading (large number in center of compass), you also see the relative difference between your bearing and your heading. So, for instance, when you want to travel in the exact direction of your bearing, the lower number should be 0°.

If you want to set a new bearing lock, just repeat the same procedure above. Each bearing lock is recorded in your dive log with a time stamp.

To clear the bearing lock from your compass view, you need to return to the surface.

To clear a bearing lock:

While in surface state, keep the middle button pressed to enter the main menu.

Scroll to GENERAL with the upper or lower buttons and press the middle button.